Shifting mechanism for type-writers.



2 SHEETS-SHEET 1- PATENTED JUNE 11, 1907.

G. G. GHRISMAN.

SHIPTING MECHANISM FOR TYPE WRITERS.

APYLIOATION FILED 00T.23.190B.

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TNE NDRRIA PETERS C0,, WASHINGTON. D. C,

N0. 856,942. PATBNTED JUNE 11, 1907. C. O. CHRISMAN. SHIFTING MECHANISM FOR TYPE WRITERS.

APPLICATION FILED 00T.23,1906.

2 SHEETS-SHEET 2.

lNvENToR. CLARENCE C, CHR\SMAN.

HTTYS.

UNITED STATES PATENT OFFICE.

CLARENCE C. CHRISMAN,

or ST. LOUIS, MISSOURI.

To. tllwhoml it may concern.-

.Be it known that I, CLARENCE 0. CHRIS- MAN, a citizen of the United States, and a resident of St. Louis, Missouri, have invented certain new and useful Improvements in Shifting Mechanism for Type-Writers, of which'the. following is a specification containing'a full, clear, and exact description, reference bein had to the accompanying drawings, forming a part hereof.

My invention relates generally to t ewriters, calculating machines, and the i e, and more particularly to improved means of shifting so as to obtain impressions of the upper-and lower case characters.

. t writers of the present construc- -tion, w h make use of a single key-board, it has general] been the practice to provide a shift key an mechanism for shifting the carriage and roller carried thereby, and by my improved means this arrangementis disnsed with, and the lower ends of the type evers are moved sli htly in order to accomplish the desir dshifl. My improved arrangement permits each type bar to carry but a single character, in stead of two characters, as is the present practice, which latter arrangement .necessaout in the claims, andi 4 rily creates a certain amount of lateral strain on the key bars when shifted from one positionito another, and in improved arrangement also does away wit considerable mechanism'used in utilizing the shifting carriage and roller carried thereby.

To the above purposes, my invention consists in certain novel features of construction and arrangement of parts, which will be hereinafter more fullly set forth, pointed lustrated'in the accompanying drawings, in which 1 Figure 1 isa vertical section taken through the center of a typewriter embodyin my improvements; Fig. 2 is a horiz'onta section taken approximately on the line 22 of Fig. 1; Fig. 3 is an enlarged detail section taken on the line 3-3 of Fi 2 Fig. 4 is a detail elevation of ortions of one of the key levers lie type bar levers; and showing lever partially depressed; Fig. 5 is a vertica section taken approximately on the line 55 of Fig. 3; Fig. 6 is an enlarged horizontal section taken on the line '66 of 5. 4 H eferring by numerals to the accompanying drawings :-.1 designates the typewriter frame, which is of the usual construction,

Specification of Letters Patent. Application filed October 28,1906. 951mm. 340,214.

Patented June 11, 1907.

ring 2, beneath wh1c the key bars 3 are fulcrumed. Formed integral with the inner faces of the sides of theframe 1 and adjacent the bottom thereof are the inwardly projecting flanges 4, and arranged to move backwardly and forwardly thereon are the ends of a pair of transverse bars 5 in which endsare formed slots 6, and through which slots pass pins 7 which are seated in the flanges 4. The ends of this pair of bars 5 are connected by rods 8, or in any suitable manner; and formed through the transversebars, at regular intervals apart, are a ertures 9. Connected to the rear one of t e bars 5 are the forward rear ends thereof being secured to the rear of the t ewriter frame 1.

tegral with the, ends of said plate are the rearwardly rojecting arms 12 whichare fulcrumed at t eir rear-ends on pins 13 seated in tegral with the rear ends of said arms 12 are the upwardly projecting arms 14, and rods 15 connect the upper ones of these arms with the front ones of the bars 5. The usual key board in the usual manner, and the sup ports or arms carrying said spacing bar pass shift key 11.

The bars 5-are normally positioned at the when the shift key:1 1 is depressed, sai bars 5 are moved forwardly; and,'when the shift key is disengaged, the retractilep'ower of the mal positions.

The key levers 16 are arranged in the lower portion of thetypewriter frame in the usual manner, and normally lie in a horizontal their rear ends jcurnaled on a transverse shaft 17 in the rear of the machine. Formed in each one of these key levers is a short longitudinally extending slot 18, and leading upa short vertical slot.19.

one of each pair bears the upper case letter,

i and the o osite one the lowercase letter; and journale in any suitable manner to the rear 11 esignates' the. shifting key which is in the form of a plate extending across the front 'of the key board. of the typewriter, and'in- A coil springs 10 return said bars 5 to their nor- The key bars 3 are arranged in pairs, and I 1 provided at theup er end with the usual ends of a-pair of retractile coil springs 10,.the

I the sides of the typewriter frame; and in:

spacing bar 11 -is arranged'in front of the through suitably formed apertures in the} rear end of their limit of movementi and wardly from the center of each of said slots is ends ofeach of. the key bars are the upper ends ioo plane slightly above the bars 5, and with 1 transverse such size and are so ,adjuste the forward end of the correspondin of the type bar levers 20'which are arranged in pa1rs to correspond with the pairs of key bars, and the lower ends of each pair of key levers are widened to form the parallel plates 21, and each corresponding pair of plates pass throu h one. of the openings 9 in the bars r v Journaled on pins 22 which are the inner faces of eachpair of plates 21 are rollers 23, which, whenthe plates are correctly positioned in the recesses 9, lie side by side, with one of said rollers occupying the rear end of the horizontal slot 18 in the corre- ,s ending type lever which passes between t e air of plates, and the adjacent roller whi'c l is carried by the opposite plate of each pair occupying the center of the horizontal slot, and immediately below the vertical slot 19.

The various parts of the ap aratus are of as that when the shift key 11 is depressedythe bars 5 are drawn forwardly a sufiicient distance to bring the airs of plates forwardly, which carries f drward one of each pair of rollers intothe slot 18,-and the rear one of each air of rollers into the center of said slot, an immediately beneath the vertical slot 19. Assuming that the t e lever carrying the roller which norma y occupies the rear end of the slot 18 operates-the type bar 3,

which carries the lower case character, said lower case character will be moved u wardly to strike a ainst the under side o'f't e roller whenever the corresponding key is depressed, owing to the position of the roller 23'carried by said lower case type lever in the slot 18, and, during this movement, the opposite roller 23 carried by the type bar lever controlling the upper case character, remains stationary, as-whenthe' key lever' 16 is deressed, the forward one of the rollers will not be affected, owing to its location inthe center of the slot 18, and immediately be neath the vertical slot 19 which receives said forward roller when the key bar is moved downwardl When it is desired to obtain an im ression of the uppercase character on the re ler, the

shift key 11 is depressed, which pulls the transverse bars forwardly to their limit .of

movement, and simultaneously moves all of the lates 21- on the lower ends ofthe type bar evers forwardly, which action carries all of the-forward rollers 23 into the forward ends of the horizontal, slots 18 and brings the rear rollers 23 to the centers of said slots and immediately beneath the slots 19. When the proper key lever 16 is 'deressed, the roller in the forwardend ofthe s ot 18 will be moved downwardly, in turn carrying-the corresponding plate 21 and key bar lever 20 downwardly and elevating the key bar carrying the upper case character.

seated in ssegess roller 23 on the lower case key lever Zilwill pies a position at the center'cf the slot 18, and, therefore, enters the vertical slot 19 when the key lever is depressed. Thus, the operation of the shifting ken 11 swings the lower ends of the type bar levers forwardly to change the positions of the rollers 23, and consequently brings the mechanism of the operated when the key bar is depressed.

My improved arrangement does away with of the machine, and can be applied to a use of. g

. '1 claim: A

it. In a writing machine, a series of type bar'levers, akey lever for said series, and a pin and slot connection between said series of type bar levers, and the key levers, whereby any one of the series of type bar levers may be actuated by the key lever, in'combination with a shifting mechanism; substantially as specified.

bar levers, key. levers for said series, a pin vers and the key levers, a shifting mechan ismwhereby one set of type barv levers may bar levers-to become engaged with the key levers substantially as specified.

type bar levers pivotally connected to the type bars and arran ed in pairs, keylevers adgacent the pairs c type bar levers, and a shifting mechanism whereby the set cf type bar levers normally engaged with the key "evers' may be moved horizontally to. disengage the entire set normally engaged, and engage 'and bring into action a set which, pre vious to the movement, was disengaged; substantially as specified.

' 4. The combination with a writing machine, provided with the usual type bars, of type bar levers pivotal'ly connected to the type bars, depending therefrom, and arranged in pairs, a key lever passingbetween the lower ends of each pair of type bar levers, a connection betweenthe ty' e bar lethetype bar levers may be actuated when the key lever is depressed, and means whereby the lower 'ends of each pair of type bar leas specified.

5. The combination a writing machine provided with the ustlal type bars, of type bar levers pivotally connectedto the During this movement, the

type bars, a connection at the junction of upper case character into position to be forms of computing and like machines Q wherein type'levers and type bars are made 4 3.'The combination with a writing ma chine, provided with the usual type bars, of

vers and the key levers whereby eit er one of vers are shifted horizontally; substantially not be affected, for the reason that it occuthe shifting of the carriage. and roller on top 2. In a writing machine, a series of. type:

and slot connection between'the type .3 ar lebe moved fromits normal position, disengagmg its connection w th the key levers, which movement causes a disengaged set or type roe said type bar levers and the key levers whereby the set of type bar levers normally engaged may be disengaged'from the key levers, which movement throws said set of type bar levers outof action and engages and bnngs into action another set of type bar levers; substantially as specified.

r 6. The combination with a writing machine, provided with the usual type-bars, of

type'bar levers pivotally connected to the' type bars, depending therefrom, and arranged in pairs, a key lever passing between the lower ends of each pair of type bar levers, a pin and slot connection between the bar levers and the key levers whereby typle elt er one of the type bar levers may beactuated when the t I e lever is depressed, and means whereby t e lower ends of the type bar levers are shifted horizontally to change the position of the pins in the slots of the connection between said type bar levers and the key levers; substantially as specified.

7. The combination with .a writing ma- 'chine, provided with the usual type bars, of type bar levers pivotally connected to the type, bars, depending therefrom, and arranged in pairs, anti-friction rollers arranged on the adjacent faces of the lower ends of each pair of type bar levers, a key lever passing thrbugh each air of type bar levers, and there being a slot ormed in each key lever to receive the anti-frictionrollers substantially as specified.

8. The combination with a writing machine, provided with the usual. type bars, of

type bar levers pivotally connected to the type bars, depending therefrom, and arranged in pairs, anti-friction rollers arranged on the adjacent faces of the lower ends of CLARENCE C. CHRISMAN.

Witnesses M. P. SMITH, E. M. HARRINGTON. 

